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Difference between revisions of "A"

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{{Plugin Sidebar 2 |
 
{{Plugin Sidebar 2 |
title=Tektronix Type A |
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title=Tektronix Type 53A |
 
summary=20 MHz amplifier plug-in |
 
summary=20 MHz amplifier plug-in |
 
image=53A 1.JPG |
 
image=53A 1.JPG |
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<gallery>
 
<gallery>
53A 1.JPG|front
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53A 1.JPG|53A front
53A 2.JPG|chassis
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53A 2.JPG|53A chassis
53A 3.JPG|chassis bottom
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53A 3.JPG|53A chassis bottom
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Tek 53-54a front.jpg|53/54A front
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Tek 53-54a top.jpg|53/54A top (dirty, missing two tubes)
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Tek 53-54a bottom.jpg|53/54A bottom
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Tek 53-54a left.jpg|53/54A left
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Tek 53-54a rear.jpg|53/54A rear
 
File:Tek type a schem.png|schematic
 
File:Tek type a schem.png|schematic
 
</gallery>
 
</gallery>

Revision as of 12:22, 14 May 2016

Tektronix Type 53A
20 MHz amplifier plug-in
Tektronix Type A

Compatible with 500-series scopes

Produced from 1959 to 1962

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type A is a single-channel preamp introduced in 1959 for 500-series scopes. It provides two inputs and has a switch to select between them. A 545 with a Type A has a system risetime of 18 nanoseconds and a bandwidth of 20 MHz.

The plug-in uses a 12AU6 in the front end as a cathode follower. This input stage drives the second stage, a differential amplifier made of two more 12AU6 tubes. The second stage drives the output stage, a pair of cathode followers made of both halves of a 12AT7 tube. The plate of each output tube is connected to the cathode of the other output tube by a 5 nF capacitor. This "cross-coupling" extends the high-frequency response.

Although 1959 was the first year one could find a "Type A" in the catalog, the same instrument with earlier "Type 53/54A" nomenclature was in the August 1956 Short Form catalog, and its slower Type 53A ancestor was in the August 1954 catalog which introduced the first 500-series scopes, the 531 and the 535. Type 53A has only three tubes, and a bandwidth of 10 MHz in the 530 mainframes. Tek never documented its performance in the 540 mainframes.

Type A was the first letter-series plug-in to be discontinued, in 1962. Customers were told to get Type B instead, although it cost more.

Specifications

Please add

Pictures